Title:
VALUABLE METAL RECOVERY METHOD
Document Type and Number:
WIPO Patent Application WO/2011/135991
Kind Code:
A1
Abstract:
Disclosed is a valuable metal recovery method that has excellent valuable metal selectivity and recovery efficiency, and furthermore is capable of reusing materials that were used in the recovery of a valuable metal. The valuable metal recovery method is characterized by involving the following steps (a) to (c): (a) a step for preparing an aqueous solution that comprises valuable metal ions and a pH-responsive polymer using formula (I) as a structural unit and that has a pH that is higher than 6.4; (b) a step for lowering the pH of the aforementioned aqueous solution below 6.4 and forming an aggregate of the pH-responsive polymer and the valuable metal; and (c) a step for recovering the aggregate from the aforementioned aqueous solution.
Inventors:
IGARASHI SHUKURO (JP)
FUSEGI TAKANORI (JP)
MURAKAMI KOICHI (JP)
TAKEMORI TOSHIFUMI (JP)
YOSHIDA NORIHIRO (JP)
FUSEGI TAKANORI (JP)
MURAKAMI KOICHI (JP)
TAKEMORI TOSHIFUMI (JP)
YOSHIDA NORIHIRO (JP)
Application Number:
PCT/JP2011/058756
Publication Date:
November 03, 2011
Filing Date:
April 07, 2011
Export Citation:
Assignee:
UNIV IBARAKI (JP)
MARUZEN PETROCHEM CO LTD (JP)
IGARASHI SHUKURO (JP)
FUSEGI TAKANORI (JP)
MURAKAMI KOICHI (JP)
TAKEMORI TOSHIFUMI (JP)
YOSHIDA NORIHIRO (JP)
MARUZEN PETROCHEM CO LTD (JP)
IGARASHI SHUKURO (JP)
FUSEGI TAKANORI (JP)
MURAKAMI KOICHI (JP)
TAKEMORI TOSHIFUMI (JP)
YOSHIDA NORIHIRO (JP)
International Classes:
C22B3/24; C02F1/58; C02F1/62; C02F1/64; C22B7/00; C22B11/00; C22B13/00; C22B15/00; C22B17/00; C22B19/20; C22B21/00; C22B23/00; C22B26/20; C22B30/06; C22B34/12; C22B34/14; C22B34/24; C22B35/00; C22B43/00; C22B58/00; C22B59/00
Foreign References:
| JP2008214551A | 2008-09-18 | |||
| JPS5424286A | 1979-02-23 |
Other References:
TAKANORI FUSHIKI ET AL.: "Ondo Otosei Polymer Poly(MOVE)s o Mochiiru Kin·Gin no Sentakuteki Bunri-Kaishu System no Kaihatsu", DAI 70 KAI ABSTRACTS OF THE SYMPOSIUM OF THE JAPAN SOCIETY FOR ANALYTICAL CHEMISTRY, vol. 70, 2 May 2009 (2009-05-02), pages 246
Attorney, Agent or Firm:
The Patent Corporate body of Ono & Co. (JP)
Patent business corporation Ono international patent firm (JP)
Patent business corporation Ono international patent firm (JP)
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Claims: